body {
  font-family: Arial, sans-serif;
  background: #181818;
  color: #fff;
  margin: 0;
  padding: 0;
}
.container {
  max-width: 700px;
  margin: 40px auto;
  background: #282828;
  padding: 30px 40px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
h1 {
  color: #1db954;
}
input[type="text"] {
  padding: 10px;
  border-radius: 5px;
  border: none;
  margin-right: 16px;
  margin-bottom: 10px;
}
form .form-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
select {
  margin-right: 12px;
  padding: 8px;
  border-radius: 5px;
  border: none;
}
.tabs {
  display: flex;
  margin-bottom: 20px;
}
.tab {
  padding: 10px 20px;
  background: #222;
  color: #fff;
  border-radius: 8px 8px 0 0;
  margin-right: 5px;
  cursor: pointer;
  font-weight: bold;
}
.tab.active {
  background: #1db954;
  color: #fff;
}
.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
}
button {
  background: #1db954;
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
}
button:hover {
  background: #17a44b;
}
.error {
  color: #ff4d4d;
  margin: 15px 0;
}
.note {
  margin-top: 30px;
  font-size: 0.95em;
  color: #ccc;
  background: #222;
  padding: 15px;
  border-radius: 6px;
}
ul {
  background: #222;
  padding: 15px;
  border-radius: 6px;
  color: #fff;
}
a {
  color: #1db954;
  text-decoration: none;
  font-weight: bold;
}
a:hover {
  text-decoration: underline;
}